US20200127383A1 - Compact folded dipole antenna with multiple frequency bands - Google Patents
Compact folded dipole antenna with multiple frequency bands Download PDFInfo
- Publication number
- US20200127383A1 US20200127383A1 US16/593,367 US201916593367A US2020127383A1 US 20200127383 A1 US20200127383 A1 US 20200127383A1 US 201916593367 A US201916593367 A US 201916593367A US 2020127383 A1 US2020127383 A1 US 2020127383A1
- Authority
- US
- United States
- Prior art keywords
- conductor
- dipole
- folded dipole
- antenna
- folded
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Images
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q9/00—Electrically-short antennas having dimensions not more than twice the operating wavelength and consisting of conductive active radiating elements
- H01Q9/04—Resonant antennas
- H01Q9/16—Resonant antennas with feed intermediate between the extremities of the antenna, e.g. centre-fed dipole
- H01Q9/28—Conical, cylindrical, cage, strip, gauze, or like elements having an extended radiating surface; Elements comprising two conical surfaces having collinear axes and adjacent apices and fed by two-conductor transmission lines
- H01Q9/285—Planar dipole
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/12—Supports; Mounting means
- H01Q1/22—Supports; Mounting means by structural association with other equipment or articles
- H01Q1/24—Supports; Mounting means by structural association with other equipment or articles with receiving set
- H01Q1/241—Supports; Mounting means by structural association with other equipment or articles with receiving set used in mobile communications, e.g. GSM
- H01Q1/246—Supports; Mounting means by structural association with other equipment or articles with receiving set used in mobile communications, e.g. GSM specially adapted for base stations
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/36—Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewith
- H01Q1/38—Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewith formed by a conductive layer on an insulating support
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q5/00—Arrangements for simultaneous operation of antennas on two or more different wavebands, e.g. dual-band or multi-band arrangements
- H01Q5/10—Resonant antennas
- H01Q5/15—Resonant antennas for operation of centre-fed antennas comprising one or more collinear, substantially straight or elongated active elements
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q9/00—Electrically-short antennas having dimensions not more than twice the operating wavelength and consisting of conductive active radiating elements
- H01Q9/04—Resonant antennas
- H01Q9/16—Resonant antennas with feed intermediate between the extremities of the antenna, e.g. centre-fed dipole
- H01Q9/26—Resonant antennas with feed intermediate between the extremities of the antenna, e.g. centre-fed dipole with folded element or elements, the folded parts being spaced apart a small fraction of operating wavelength
Definitions
- Dipole antennas are commonly used for wireless communications.
- a dipole antenna typically includes two identical conductive elements to which a driving current from a transmitter is applied, or from which a received wireless signal is applied to a receiver.
- a dipole antenna most commonly includes two conductors of equal length oriented end-to-end with a feedline connected between them.
- a folded dipole antenna consists of a half-wave dipole with an additional wire connecting its two ends. The far-field emission pattern of the folded dipole antenna is nearly identical to the half-wavelength dipole, but typically has an increased impedance and a wider bandwidth.
- Half-wavelength folded dipoles are used for various applications including, for example, for Frequency Modulated (FM) radio antennas.
- FM Frequency Modulated
- FIG. 1 depicts a three-dimensional view of a folded dipole antenna structure according an exemplary implementation
- FIG. 2A depicts a two-dimensional “top” view of the first side of the antenna structure depicted in FIG. 1 ;
- FIG. 2B depicts a two-dimensional “see-through” view of the second side of the antenna structure depicted in FIG. 1 ;
- FIG. 3 depicts further details of the antenna conductor layout on the first side of the planar dielectric of FIG. 1 according to one exemplary implementation
- FIG. 4 depicts further details of the second side of the planar dielectric of FIG. 1 according to one exemplary implementation.
- FIG. 5 depicts a plot of Voltage Standing Wave Ratio versus frequency for an exemplary folded dipole antenna structure corresponding to FIG. 1 .
- a compact folded dipole antenna structure includes two parallel connected, folded dipoles formed on one side of a planar dielectric, such as a Printed Circuit Board (PCB); a feed line, a tunable frequency tuning element, and a tunable impedance matching element formed on a second, opposite side of the planar dielectric.
- the resulting antenna structure is compact and is also self-resonant such that the antenna structure does not need to be attached to another structure to resonate.
- Each of the folded dipoles of the antenna structure includes, within a gap of each folded dipole, a dipole stub that divides or bisects a respective passive, non-fed arm of each folded dipole.
- the frequency tuning element formed on the side of the planar dielectric opposite the folded dipoles, extends across the length of the antenna structure and is electrically coupled to the dipole stub of each folded dipole such that the frequency tuning element electrically divides or bisects each folded dipole (i.e., electrically connects the non-fed arm of the first dipole to the non-fed arm of the second dipole).
- the frequency tuning element through its electrical connections to each dipole stub and bisection of each folded dipole, effectively creates two additional folded dipoles within the antenna conductor layout. This creation of two additional folded dipoles enables the antenna structure to resonate on two separate frequency bands.
- the antenna structure additionally includes a tunable impedance matching element formed on a second, opposite side of the planar dielectric and which extends across a gap between respective feed sections of each of the folded dipoles. Since current is balanced in the layout of the antenna structure, no external balun needs to be used with the antenna structure.
- the antenna structure may also include a microstrip feed line that may be formed integrally with the antenna layout, eliminating a need for an external coaxial structure.
- the antenna structure described herein may be used in, for example, a meter such as a utility meter (e.g., a water meter or power usage meter).
- the antenna structure may be a component of a meter interface unit within the utility meter that enables primary communication with the utility meter in first frequency band and secondary communication with the utility meter in a second frequency band (e.g., for BluetoothTM communication).
- the compact nature of the antenna structure requiring use of no external components (e.g., no components on an external PCB), enables it to be fit within the physical constraints of existing meter interface units, or more easily fit within newly designed meter interface units.
- FIG. 1 depicts a three-dimensional view of a folded dipole antenna structure 100 according to an exemplary implementation.
- the folded dipole antenna structure 100 includes a planar dielectric 105 having a first side 110 , and an opposite, second side 115 .
- first side 110 may be a “top” side and the second side 115 may be a “bottom” side.
- Planar dielectric 105 may include one or more of various types of dielectric material, such as, for example, fiberglass, glass, plastic, mica, and metal oxide, and may have a thickness (T d ) ranging from approximately 0.008 inch to about 0.24 inch. In one exemplary implementation, planar dielectric 105 may have a thickness T d of 0.032 inches.
- the first side 110 of planar dielectric 105 has an antenna conductor layout 120 formed upon it.
- the antenna conductor layout 120 forms two parallel-connected folded dipoles, as described in further detail below.
- the second side 115 of planar dielectric 105 includes a feed line conductor 125 , a primary frequency tuning conductor 130 , and a primary impedance matching (IM) conductor 135 formed upon it.
- Feed line conductor 125 traces a pattern upon the second side 115 of planar dielectric 105 to connect a feed connector 150 , through a via 1 145 , to a feed section (described further below) of the antenna conductor layout 120 .
- a transmitter transmits signals via the antenna structure 100
- the transmitter signals are received by the center conductor of feed connector 150 , conveyed through via 1 145 to feed line conductor 125 , conveyed along a length of the feed line conductor 125 , and conveyed through via 2 155 to the feed section of the folded dipoles on the first side 110 of planar dielectric 105 .
- a receiver receives signals via the antenna structure 100
- wireless signals received by antenna structure 100 are conveyed, via the feed section, through via 2 155 , conveyed along a length of the feed line conductor 125 , and conveyed through via 1 145 to the center conductor of feed connector 150 .
- the second side 115 of planar dielectric 105 may optionally have a secondary impedance matching conductor 140 formed at a location along the length of the feed line conductor 125 .
- FIG. 2A depicts a two-dimensional “top” view of the first side 110 of antenna structure 100 .
- FIG. 2B depicts a two-dimensional “see-through” view of the second side 115 of antenna structure 100 .
- the material of planar dielectric 105 is depicted as transparent such that the underlying conductor layouts on the underside of planar dielectric 105 can be clearly seen.
- a left portion of the antenna conductor layout 120 includes a first folded dipole 200
- a right portion of the antenna conductor layout 120 includes a second folded dipole 205 .
- feed connector 150 includes a common (e.g., ground) connection to the antenna conductor layout 120 via a connector sleeve 210 of connector 150 . Both folded dipoles 200 and 205 are electrically connected to the common connection at feed connector 150 .
- the center conductor 215 of connector 150 acts as the feed conductor and either supplies a transmitter signal (not shown) to feed line conductor 125 ( FIG. 2B ) through via 1 145 (not shown) or supplies a received signal from via 1 145 and feed line conductor 125 to a receiver (not shown) connected to connector 150 .
- Feed line conductor 125 ( FIG. 2B ) supplies the transmitter signal through via 2 155 to a feed section 225 of the antenna conductor layout 120 .
- folded dipole 200 and folded dipole 205 are connected in parallel with one another between the common connection at connector 150 and the feed connection from center conductor 215 of connector 150 (i.e., through via 2 155 to feed line conductor 125 , through via 2 155 , to feed section 225 ).
- folded dipole 1 200 includes a dipole stub 1 235 - 1 that divides an outer arm (referred to herein as the passive, non-feed arm) of dipole 1 200 .
- Folded dipole 2 205 further includes a dipole stub 2 235 - 2 that divides the passive, non-feed arm of dipole 2 205 .
- Primary frequency tuning conductor 130 (also referred to herein as “tuning element 130 ”), depicted in FIG. 2B , includes a length of conductor that extends over a length of the antenna conductor layout 120 on the first side 110 of planar dielectric 105 .
- a first end of tuning element 130 i.e., the left side in FIG.
- each end of tuning element 130 may capacitively couple to dipole stubs 235 - 1 and 235 - 2 through the dielectric material of planar dielectric 105 .
- each end of tuning element 130 may directly electrically connect to dipole stubs 235 - 1 and 235 - 2 through conductive vias (not shown) that extend through the dielectric material of planar dielectric 105 .
- Frequency tuning element 130 via its connections to dipole stubs 235 - 1 and 235 - 2 , divides folded dipole 1 200 and folded dipole 2 205 to effectively create two additional folded dipoles within the antenna conductor layout 120 : folded dipole 3 245 and folded dipole 4 250 ( FIG. 2A ). Therefore, by the connection of tuning element 130 across dipole stubs 235 - 1 and 235 - 2 , a secondary folded dipole 3 245 is created within folded dipole 1 200 , and another secondary folded dipole 4 250 is created within folded dipole 2 205 . Additional details regarding dimensions of the components of antenna conductor layout 120 of an exemplary implementation are described below with respect to FIG. 3 .
- via 1 145 which passes through the dielectric material of planar dielectric 105 , electrically connects to a first end of feed line conductor 125 .
- the feed line conductor 125 traces a circuitous pattern upon second side 115 of planar dielectric 105 that follows a portion of the pattern of antenna conductor layout 120 on the first side 110 .
- a first end of feed line conductor 125 connects to center conductor 215 of connector 150 through via 1 145
- a second end of feed line conductor 125 connects to feed section 225 of antenna conductor layout 120 through via 2 155 .
- a primary impedance matching conductor 135 (also referred to herein as “impedance matching element 135 ”) extends across second side 115 of planar dielectric 105 to electrically couple the two sides of feed section 225 of antenna conductor layout 120 .
- Primary impedance matching element 135 includes a conductive strip that extends from a first side of feed section 225 to a second side of feed section 225 to electrically couple the two sides.
- primary impedance matching element 135 may capacitively couple, across the dielectric material of planar dielectric 105 , the first side of feed section 225 to the second side of feed section 225 .
- two conductive vias may extend through the planar dielectric 105 to connect a first end of impedance matching conductor/element 135 to a first side of feed section 225 , and a second end of impedance matching conductor/element 135 to a second side of feed section 225 .
- An optional secondary impedance matching conductor 140 (also referred to herein as “impedance matching element 140 ”) may be located along the length of feed line conductor 125 , as described further below with respect to FIG. 4 . Additional details regarding dimensions of the various components formed on second side 115 of planar dielectric 105 of an exemplary implementation are described below with respect to FIG. 4 .
- FIG. 3 depicts further details of antenna conductor layout 120 on first side 110 of the planar dielectric 105 according to one exemplary implementation.
- folded dipole 1 200 and folded dipole 2 205 (depicted in FIG. 2A ) of antenna conductor layout 120 may each have a length 1 a and a width 1 b .
- length 1 a may be 1.815 inches and width 1 b may be 2.430 inches.
- folded dipole 3 245 and folded dipole 4 250 (depicted in FIG. 2A ) may each have a length 1 d and a width 1 c .
- length 1 d may be 0.600 inches and width 1 c may be 1.215 inches.
- Dipole stub 1 235 - 1 and dipole stub 235 - 2 may each have a length 1 g and a width 1 h .
- length 1 g may be 0.419 inches and width 1 h may be 0.040 inches
- antenna conductor layout 120 includes feed section 225 , a first radiating section 300 - 1 (corresponding to folded dipole 1 200 and folded dipole 3 245 ), a second radiating section 300 - 2 (corresponding to folded dipole 2 205 and folded dipole 4 250 ), and a common section 305 .
- Feed section 225 may be divided into two sections, each having a length 1 e and a width 1 f , and each separated from one another by a gap G 1 in the conductor material.
- the two sections of feed section 225 may have a length 1 e of 1.170 inches, a width if of 0.440 inches, and a gap G 1 of 0.060 inches.
- the two sections, each having a length 1 e , of feed section 225 may be separated from common section 305 of antenna conductor layout 120 by a gap G 3 .
- the gap G 3 may be 0.200 inches.
- Common section 305 may additionally have a width 1 f , similar to width if of the two sections of feed section 225 .
- First radiating section 300 - 1 includes a feed arm 310 - 1 that connects to a non-feed arm 315 - 1 .
- Second radiating section 300 - 2 includes a feed arm 310 - 2 that connects to a non-feed arm 315 - 2 .
- Feed arms 310 - 1 and 310 - 2 connect, respectively, to each of the two feed sections having length 1 e .
- Feed arms 310 - 1 and 310 - 2 , and non-feed arms 315 - 1 and 315 - 2 each have a width of 1 i .
- the width 1 i may be 0.200 inches.
- Feed arm 310 - 1 and non-feed arm 315 - 1 , and feed arm 310 - 2 and non-feed arm 315 - 2 are, as shown in FIG. 3 , separated by a gap G 2 .
- the gap G 2 may be 0.20 inches.
- Feed arm 310 - 1 connects to non-feed arm 315 - 1
- feed arm 310 - 2 connects to non-feed arm 315 - 1 , with sections of conductor each having a width 1 j .
- Non-feed arm 315 - 1 connects to common section 305
- non-feed arm 315 - 2 connects to common section 305 with sections of conductor each having a width 1 k .
- width 1 j may be 0.238 inches and width 1 k may be 0.268 inches.
- FIG. 4 depicts further details of second side 115 of the planar dielectric 105 according to one exemplary implementation.
- feed line conductor 125 may include a conductive strip-line that traces a path, that roughly corresponds to a shape of a portion of antenna conductor layout 120 on first side 110 , from a connection with via 1 145 to a connection with via 2 155 .
- Optional secondary impedance matching element 140 including a conductive element having a length 2 e and a width 2 f may be formed at a distance d from the connection to via 1 145 along the conductive strip-line of feed line conductor 125 upon second side 115 .
- the distance d may be 5.903 inches
- the length 2 e may be 0.390 inches
- the width 2 f may be 0.217 inches.
- the length 2 e , width 2 f and distance d along the conductive strip-line of feed line conductor 125 may each be selected so as to adjust the impedance of folded dipole antenna structure 100 for impedance matching.
- primary frequency tuning element 130 may include a conductive element, having a length 2 a and a width 2 b , formed upon second side 115 such that a first end (the left side of element 130 ) is disposed opposite dipole stub 1 235 - 1 on first side 110 to enable the first end to capacitively couple to dipole stub 1 235 - 1 through the dielectric material of planar dielectric 105 .
- primary frequency tuning element 130 may be formed upon second side 115 such that a second end (the right side of element 130 ) is disposed opposite dipole stub 2 235 - 2 on first side 110 to enable the second end to capacitively couple to dipole stub 2 235 - 2 through the dielectric material of planar dielectric 105 .
- Primary frequency tuning element 130 therefore, electrically couples across a length of antenna conductor layout 120 between dipole stub 1 235 - 1 and dipole stub 2 235 - 2 .
- length 2 a may be 2.360 inches and width 2 b may be 0.040 inches.
- the selected length 2 a of primary frequency tuning element 130 adjusts the fundamental frequency (i.e., frequency band 1 described below with respect to FIG. 5 ) of the folded dipole antenna structure 100 .
- FIG. 4 additionally depicts primary impedance matching element 135 , including a conductive element having a length 2 c and a width 2 d , formed upon second side 115 such that a first end (the left side of element 135 ) is disposed opposite the left section of feed section 225 of antenna conductor layout 120 to enable the first end to capacitively couple to the left end of feed section 225 through the dielectric material of planar dielectric 105 .
- primary impedance matching element 135 including a conductive element having a length 2 c and a width 2 d , formed upon second side 115 such that a first end (the left side of element 135 ) is disposed opposite the left section of feed section 225 of antenna conductor layout 120 to enable the first end to capacitively couple to the left end of feed section 225 through the dielectric material of planar dielectric 105 .
- primary impedance matching element 135 may be formed upon second side 115 such that a second end (the right side of element 135 ) is disposed opposite the right section of feed section 225 of antenna conductor layout 120 to enable the second end to capacitively couple to the right end of feed section 225 through the dielectric material of planar dielectric 105 .
- Primary impedance matching element 135 therefore, electrically couples across gap G 1 ( FIG. 3 ) between the two separate sections of feed section 225 of antenna conductor layout 120 .
- length 2 c may be 0.500 inches and width 2 d may be 0.050 inches.
- the length 2 c of primary impedance matching element 135 may be selected so as to adjust the impedance of folded dipole antenna structure 100 .
- FIG. 5 depicts a plot 500 of Voltage Standing Wave Ratio (VSWR) versus frequency for the exemplary implementation of the folded dipole antenna structure 100 described herein.
- the x-axis of the plot 500 includes frequency, ranging from 500 MegaHertz (MHz) to 2.5 GigaHertz (GHz).
- the y-axis of the plot 500 includes VSWR, ranging from 1.00 to 11.00.
- the impedance of the transmitter/receiver and the transmission line must be well matched to the antenna's impedance.
- the VSWR parameter of an antenna numerically measures how well the antenna is impedance matched to the transmitter/receiver.
- the minimum VSWR of an antenna is 1.0, at which no power is reflected from the antenna.
- Bandwidth requirements of antennas are typically expressed in terms of VSWR. For example, an antenna for a particular application x may need to operate from 1.0 GHz to 1.3 GHz with a VSWR less than 3.0.
- the plotted VSWR indicates that the exemplary implementation of the folded dipole antenna structure 100 described herein has at least two separate frequency bands at which the VSWR is 2.0 or lower.
- the first frequency band (frequency band 1 ) spans from the lower frequency of 809.9 MHz at the number “1” 505 to the higher frequency of 1.09 GHz at the number “2” 510 .
- the second frequency band (frequency band 2 ) spans from the lower frequency of 1.491 GHz at “3” 515 to the higher frequency of 1.61 GHz at “4” 520 .
- the first frequency band could be used for primary communications, and the second frequency band could be used for secondary communications.
- the antenna's impedance is, therefore, well matched to the transmitter/receiver and the transmission line within frequency band 1 and frequency band 2 shown in FIG. 5 .
- the frequency bands depicted in FIG. 5 may be changed based on changing the dimensions of the antenna structure 100 , such as changing lengths of 1 a , 1 b , 1 c , 1 d , and/or 2 a of the antenna conductor layout 120 .
- the dimensions of the antenna structure 100 may be modified such that the second frequency band could be used for BluetoothTM communications (e.g., spanning a range from 2.400-2.485 GHz).
- antenna patterns have been shown and various exemplary dimensions have been provided. It should be understood that different patterns and/or dimensions may be used than those described herein.
- Various dimensions associated with antenna conductor layout 120 , planar dielectric 105 , feed line conductor 125 , frequency tuning element 130 , and impedance matching elements 135 and 140 have been provided herein. It should be understood that different dimensions of the conductor elements and the dielectric, such as different lengths, widths, thicknesses, etc., may be used than those described herein.
- the resonant frequencies, and antenna impedance, of antenna structure 100 may be adjusted based on varying the relative lengths, widths, and/or thickness of the antenna components described herein.
- This logic or unit may include hardware, such as one or more processors, microprocessors, application specific integrated circuits, or field programmable gate arrays, software, or a combination of hardware and software.
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Variable-Direction Aerials And Aerial Arrays (AREA)
- Details Of Aerials (AREA)
Abstract
Description
- This application claims priority under 35 U.S.C. § 119, based on U.S. Provisional Application No. 62/749,330, filed Oct. 23, 2018, the disclosure of which is hereby incorporated by reference herein.
- Dipole antennas are commonly used for wireless communications. A dipole antenna typically includes two identical conductive elements to which a driving current from a transmitter is applied, or from which a received wireless signal is applied to a receiver. A dipole antenna most commonly includes two conductors of equal length oriented end-to-end with a feedline connected between them. A half-wave dipole includes two quarter-wavelength conductors placed end to end for a total length (L) of approximately L=λ/2, where λ is the intended wavelength of operation. A folded dipole antenna consists of a half-wave dipole with an additional wire connecting its two ends. The far-field emission pattern of the folded dipole antenna is nearly identical to the half-wavelength dipole, but typically has an increased impedance and a wider bandwidth. Half-wavelength folded dipoles are used for various applications including, for example, for Frequency Modulated (FM) radio antennas.
-
FIG. 1 depicts a three-dimensional view of a folded dipole antenna structure according an exemplary implementation; -
FIG. 2A depicts a two-dimensional “top” view of the first side of the antenna structure depicted inFIG. 1 ; -
FIG. 2B depicts a two-dimensional “see-through” view of the second side of the antenna structure depicted inFIG. 1 ; -
FIG. 3 depicts further details of the antenna conductor layout on the first side of the planar dielectric ofFIG. 1 according to one exemplary implementation; -
FIG. 4 depicts further details of the second side of the planar dielectric ofFIG. 1 according to one exemplary implementation; and -
FIG. 5 depicts a plot of Voltage Standing Wave Ratio versus frequency for an exemplary folded dipole antenna structure corresponding toFIG. 1 . - The following detailed description refers to the accompanying drawings. The same reference numbers in different drawings may identify the same or similar elements. The following detailed description does not limit the invention.
- A compact folded dipole antenna structure, as described herein, includes two parallel connected, folded dipoles formed on one side of a planar dielectric, such as a Printed Circuit Board (PCB); a feed line, a tunable frequency tuning element, and a tunable impedance matching element formed on a second, opposite side of the planar dielectric. The resulting antenna structure is compact and is also self-resonant such that the antenna structure does not need to be attached to another structure to resonate. Each of the folded dipoles of the antenna structure includes, within a gap of each folded dipole, a dipole stub that divides or bisects a respective passive, non-fed arm of each folded dipole. The frequency tuning element, formed on the side of the planar dielectric opposite the folded dipoles, extends across the length of the antenna structure and is electrically coupled to the dipole stub of each folded dipole such that the frequency tuning element electrically divides or bisects each folded dipole (i.e., electrically connects the non-fed arm of the first dipole to the non-fed arm of the second dipole). The frequency tuning element, through its electrical connections to each dipole stub and bisection of each folded dipole, effectively creates two additional folded dipoles within the antenna conductor layout. This creation of two additional folded dipoles enables the antenna structure to resonate on two separate frequency bands. The antenna structure additionally includes a tunable impedance matching element formed on a second, opposite side of the planar dielectric and which extends across a gap between respective feed sections of each of the folded dipoles. Since current is balanced in the layout of the antenna structure, no external balun needs to be used with the antenna structure. The antenna structure may also include a microstrip feed line that may be formed integrally with the antenna layout, eliminating a need for an external coaxial structure. The antenna structure described herein may be used in, for example, a meter such as a utility meter (e.g., a water meter or power usage meter). The antenna structure may be a component of a meter interface unit within the utility meter that enables primary communication with the utility meter in first frequency band and secondary communication with the utility meter in a second frequency band (e.g., for Bluetooth™ communication). The compact nature of the antenna structure, requiring use of no external components (e.g., no components on an external PCB), enables it to be fit within the physical constraints of existing meter interface units, or more easily fit within newly designed meter interface units.
-
FIG. 1 depicts a three-dimensional view of a foldeddipole antenna structure 100 according to an exemplary implementation. As shown, the foldeddipole antenna structure 100 includes a planar dielectric 105 having afirst side 110, and an opposite,second side 115. In the example shown,first side 110 may be a “top” side and thesecond side 115 may be a “bottom” side. Planar dielectric 105 may include one or more of various types of dielectric material, such as, for example, fiberglass, glass, plastic, mica, and metal oxide, and may have a thickness (Td) ranging from approximately 0.008 inch to about 0.24 inch. In one exemplary implementation, planar dielectric 105 may have a thickness Td of 0.032 inches. Thefirst side 110 of planar dielectric 105 has anantenna conductor layout 120 formed upon it. Theantenna conductor layout 120 forms two parallel-connected folded dipoles, as described in further detail below. - The
second side 115 of planar dielectric 105 includes afeed line conductor 125, a primaryfrequency tuning conductor 130, and a primary impedance matching (IM)conductor 135 formed upon it.Feed line conductor 125 traces a pattern upon thesecond side 115 of planar dielectric 105 to connect afeed connector 150, through avia 1 145, to a feed section (described further below) of theantenna conductor layout 120. In an example in which a transmitter (not shown) transmits signals via theantenna structure 100, the transmitter signals are received by the center conductor offeed connector 150, conveyed through via 1 145 to feedline conductor 125, conveyed along a length of thefeed line conductor 125, and conveyed through via 2 155 to the feed section of the folded dipoles on thefirst side 110 of planar dielectric 105. In an example in which a receiver (not shown) receives signals via theantenna structure 100, wireless signals received byantenna structure 100 are conveyed, via the feed section, through via 2 155, conveyed along a length of thefeed line conductor 125, and conveyed through via 1 145 to the center conductor offeed connector 150. Thesecond side 115 of planar dielectric 105 may optionally have a secondary impedance matchingconductor 140 formed at a location along the length of thefeed line conductor 125. -
FIG. 2A depicts a two-dimensional “top” view of thefirst side 110 ofantenna structure 100.FIG. 2B depicts a two-dimensional “see-through” view of thesecond side 115 ofantenna structure 100. In the view ofFIG. 2B , the material of planar dielectric 105 is depicted as transparent such that the underlying conductor layouts on the underside of planar dielectric 105 can be clearly seen. Returning toFIG. 2A , a left portion of theantenna conductor layout 120 includes a first foldeddipole 200, and a right portion of theantenna conductor layout 120 includes a second foldeddipole 205. As shown,feed connector 150 includes a common (e.g., ground) connection to theantenna conductor layout 120 via aconnector sleeve 210 ofconnector 150. Both foldeddipoles feed connector 150. Thecenter conductor 215 ofconnector 150 acts as the feed conductor and either supplies a transmitter signal (not shown) to feed line conductor 125 (FIG. 2B ) through via 1 145 (not shown) or supplies a received signal from via 1 145 andfeed line conductor 125 to a receiver (not shown) connected toconnector 150. Feed line conductor 125 (FIG. 2B ) supplies the transmitter signal through via 2 155 to afeed section 225 of theantenna conductor layout 120. Therefore, foldeddipole 200 and foldeddipole 205 are connected in parallel with one another between the common connection atconnector 150 and the feed connection fromcenter conductor 215 of connector 150 (i.e., through via 2 155 to feedline conductor 125, through via 2 155, to feed section 225). - As shown in
FIG. 2A , foldeddipole 1 200 includes adipole stub 1 235-1 that divides an outer arm (referred to herein as the passive, non-feed arm) ofdipole 1 200. Foldeddipole 2 205 further includes adipole stub 2 235-2 that divides the passive, non-feed arm ofdipole 2 205. Primary frequency tuning conductor 130 (also referred to herein as “tuningelement 130”), depicted inFIG. 2B , includes a length of conductor that extends over a length of theantenna conductor layout 120 on thefirst side 110 ofplanar dielectric 105. A first end of tuning element 130 (i.e., the left side inFIG. 2B ) couples to dipolestub 1 235-1 across the width Td ofplanar dielectric 105, and a second end of tuning element 130 (i.e., the right side inFIG. 2B ) couples to dipolestub 2 235-2 across the width Td ofplanar dielectric 105. In one exemplary implementation, each end of tuningelement 130 may capacitively couple to dipole stubs 235-1 and 235-2 through the dielectric material ofplanar dielectric 105. In another implementation, each end of tuningelement 130 may directly electrically connect to dipole stubs 235-1 and 235-2 through conductive vias (not shown) that extend through the dielectric material ofplanar dielectric 105.Frequency tuning element 130, via its connections to dipole stubs 235-1 and 235-2, divides foldeddipole 1 200 and foldeddipole 2 205 to effectively create two additional folded dipoles within the antenna conductor layout 120: foldeddipole 3 245 and foldeddipole 4 250 (FIG. 2A ). Therefore, by the connection of tuningelement 130 across dipole stubs 235-1 and 235-2, a secondary foldeddipole 3 245 is created within foldeddipole 1 200, and another secondary foldeddipole 4 250 is created within foldeddipole 2 205. Additional details regarding dimensions of the components ofantenna conductor layout 120 of an exemplary implementation are described below with respect toFIG. 3 . - As shown in
FIG. 2B , via 1 145, which passes through the dielectric material ofplanar dielectric 105, electrically connects to a first end offeed line conductor 125. Thefeed line conductor 125 traces a circuitous pattern uponsecond side 115 ofplanar dielectric 105 that follows a portion of the pattern ofantenna conductor layout 120 on thefirst side 110. A first end offeed line conductor 125 connects to centerconductor 215 ofconnector 150 through via 1 145, and a second end offeed line conductor 125 connects to feedsection 225 ofantenna conductor layout 120 through via 2 155. A primary impedance matching conductor 135 (also referred to herein as “impedance matching element 135”) extends acrosssecond side 115 ofplanar dielectric 105 to electrically couple the two sides offeed section 225 ofantenna conductor layout 120. Primaryimpedance matching element 135 includes a conductive strip that extends from a first side offeed section 225 to a second side offeed section 225 to electrically couple the two sides. In one implementation, primaryimpedance matching element 135 may capacitively couple, across the dielectric material ofplanar dielectric 105, the first side offeed section 225 to the second side offeed section 225. In another implementation, two conductive vias (not shown) may extend through theplanar dielectric 105 to connect a first end of impedance matching conductor/element 135 to a first side offeed section 225, and a second end of impedance matching conductor/element 135 to a second side offeed section 225. An optional secondary impedance matching conductor 140 (also referred to herein as “impedance matching element 140”) may be located along the length offeed line conductor 125, as described further below with respect toFIG. 4 . Additional details regarding dimensions of the various components formed onsecond side 115 ofplanar dielectric 105 of an exemplary implementation are described below with respect toFIG. 4 . -
FIG. 3 depicts further details ofantenna conductor layout 120 onfirst side 110 of theplanar dielectric 105 according to one exemplary implementation. As shown, foldeddipole 1 200 and foldeddipole 2 205 (depicted inFIG. 2A ) ofantenna conductor layout 120 may each have alength 1 a and awidth 1 b. In one exemplary implementation,length 1 a may be 1.815 inches andwidth 1 b may be 2.430 inches. Further, foldeddipole 3 245 and foldeddipole 4 250 (depicted inFIG. 2A ) may each have alength 1 d and awidth 1 c. In one exemplary implementation,length 1 d may be 0.600 inches andwidth 1 c may be 1.215 inches.Dipole stub 1 235-1 and dipole stub 235-2 may each have alength 1 g and a width 1 h. In one exemplary implementation,length 1 g may be 0.419 inches and width 1 h may be 0.040 inches - As further depicted in
FIG. 3 ,antenna conductor layout 120 includesfeed section 225, a first radiating section 300-1 (corresponding to foldeddipole 1 200 and foldeddipole 3 245), a second radiating section 300-2 (corresponding to foldeddipole 2 205 and foldeddipole 4 250), and acommon section 305.Feed section 225 may be divided into two sections, each having alength 1 e and a width 1 f, and each separated from one another by a gap G1 in the conductor material. In one exemplary implementation, the two sections offeed section 225 may have alength 1 e of 1.170 inches, a width if of 0.440 inches, and a gap G1 of 0.060 inches. The two sections, each having alength 1 e, offeed section 225 may be separated fromcommon section 305 ofantenna conductor layout 120 by a gap G3. In one exemplary implementation, the gap G3 may be 0.200 inches.Common section 305 may additionally have a width 1 f, similar to width if of the two sections offeed section 225. - First radiating section 300-1 includes a feed arm 310-1 that connects to a non-feed arm 315-1. Second radiating section 300-2 includes a feed arm 310-2 that connects to a non-feed arm 315-2. Feed arms 310-1 and 310-2 connect, respectively, to each of the two feed
sections having length 1 e. Feed arms 310-1 and 310-2, and non-feed arms 315-1 and 315-2, each have a width of 1 i. In one exemplary implementation, the width 1 i may be 0.200 inches. Feed arm 310-1 and non-feed arm 315-1, and feed arm 310-2 and non-feed arm 315-2, are, as shown inFIG. 3 , separated by a gap G2. In one exemplary implementation, the gap G2 may be 0.20 inches. Feed arm 310-1 connects to non-feed arm 315-1, and feed arm 310-2 connects to non-feed arm 315-1, with sections of conductor each having a width 1 j. Non-feed arm 315-1 connects tocommon section 305, and non-feed arm 315-2 connects tocommon section 305 with sections of conductor each having awidth 1 k. In one exemplary implementation, width 1 j may be 0.238 inches andwidth 1 k may be 0.268 inches. -
FIG. 4 depicts further details ofsecond side 115 of theplanar dielectric 105 according to one exemplary implementation. As shown,feed line conductor 125 may include a conductive strip-line that traces a path, that roughly corresponds to a shape of a portion ofantenna conductor layout 120 onfirst side 110, from a connection with via 1 145 to a connection with via 2 155. Optional secondaryimpedance matching element 140, including a conductive element having a length 2 e and awidth 2 f may be formed at a distance d from the connection to via 1 145 along the conductive strip-line offeed line conductor 125 uponsecond side 115. In one exemplary implementation, the distance d may be 5.903 inches, the length 2 e may be 0.390 inches, and thewidth 2 f may be 0.217 inches. The length 2 e,width 2 f and distance d along the conductive strip-line offeed line conductor 125 may each be selected so as to adjust the impedance of foldeddipole antenna structure 100 for impedance matching. - As further shown in
FIG. 4 , primaryfrequency tuning element 130 may include a conductive element, having a length 2 a and a width 2 b, formed uponsecond side 115 such that a first end (the left side of element 130) is disposedopposite dipole stub 1 235-1 onfirst side 110 to enable the first end to capacitively couple to dipolestub 1 235-1 through the dielectric material ofplanar dielectric 105. Additionally, primaryfrequency tuning element 130 may be formed uponsecond side 115 such that a second end (the right side of element 130) is disposedopposite dipole stub 2 235-2 onfirst side 110 to enable the second end to capacitively couple to dipolestub 2 235-2 through the dielectric material ofplanar dielectric 105. Primaryfrequency tuning element 130, therefore, electrically couples across a length ofantenna conductor layout 120 betweendipole stub 1 235-1 anddipole stub 2 235-2. In one exemplary implementation, length 2 a may be 2.360 inches and width 2 b may be 0.040 inches. The selected length 2 a of primaryfrequency tuning element 130 adjusts the fundamental frequency (i.e.,frequency band 1 described below with respect toFIG. 5 ) of the foldeddipole antenna structure 100. -
FIG. 4 additionally depicts primaryimpedance matching element 135, including a conductive element having alength 2 c and a width 2 d, formed uponsecond side 115 such that a first end (the left side of element 135) is disposed opposite the left section offeed section 225 ofantenna conductor layout 120 to enable the first end to capacitively couple to the left end offeed section 225 through the dielectric material ofplanar dielectric 105. Additionally, primaryimpedance matching element 135 may be formed uponsecond side 115 such that a second end (the right side of element 135) is disposed opposite the right section offeed section 225 ofantenna conductor layout 120 to enable the second end to capacitively couple to the right end offeed section 225 through the dielectric material ofplanar dielectric 105. Primaryimpedance matching element 135, therefore, electrically couples across gap G1 (FIG. 3 ) between the two separate sections offeed section 225 ofantenna conductor layout 120. In one exemplary implementation,length 2 c may be 0.500 inches and width 2 d may be 0.050 inches. Thelength 2 c of primaryimpedance matching element 135 may be selected so as to adjust the impedance of foldeddipole antenna structure 100. -
FIG. 5 depicts aplot 500 of Voltage Standing Wave Ratio (VSWR) versus frequency for the exemplary implementation of the foldeddipole antenna structure 100 described herein. The x-axis of theplot 500 includes frequency, ranging from 500 MegaHertz (MHz) to 2.5 GigaHertz (GHz). The y-axis of theplot 500 includes VSWR, ranging from 1.00 to 11.00. As is understood in the art, for a transmitter to deliver power to an antenna, or receive power from the antenna, the impedance of the transmitter/receiver and the transmission line must be well matched to the antenna's impedance. The VSWR parameter of an antenna numerically measures how well the antenna is impedance matched to the transmitter/receiver. The smaller an antenna's VSWR is, the better the antenna is matched to the transmitter/receiver and the transmission line, and the more power is delivered to/from the antenna. The minimum VSWR of an antenna is 1.0, at which no power is reflected from the antenna. Bandwidth requirements of antennas are typically expressed in terms of VSWR. For example, an antenna for a particular application x may need to operate from 1.0 GHz to 1.3 GHz with a VSWR less than 3.0. - In the
plot 500 ofFIG. 5 , the plotted VSWR indicates that the exemplary implementation of the foldeddipole antenna structure 100 described herein has at least two separate frequency bands at which the VSWR is 2.0 or lower. The first frequency band (frequency band 1) spans from the lower frequency of 809.9 MHz at the number “1” 505 to the higher frequency of 1.09 GHz at the number “2” 510. The second frequency band (frequency band 2) spans from the lower frequency of 1.491 GHz at “3” 515 to the higher frequency of 1.61 GHz at “4” 520. The first frequency band could be used for primary communications, and the second frequency band could be used for secondary communications. The antenna's impedance is, therefore, well matched to the transmitter/receiver and the transmission line withinfrequency band 1 andfrequency band 2 shown inFIG. 5 . One skilled in the art will recognize, however, that the frequency bands depicted inFIG. 5 may be changed based on changing the dimensions of theantenna structure 100, such as changing lengths of 1 a, 1 b, 1 c, 1 d, and/or 2 a of theantenna conductor layout 120. For example, the dimensions of theantenna structure 100 may be modified such that the second frequency band could be used for Bluetooth™ communications (e.g., spanning a range from 2.400-2.485 GHz). - The foregoing description of implementations provides illustration and description, but is not intended to be exhaustive or to limit the invention to the precise form disclosed. Modifications and variations are possible in light of the above teachings or may be acquired from practice of the invention. For example, various antenna patterns have been shown and various exemplary dimensions have been provided. It should be understood that different patterns and/or dimensions may be used than those described herein. Various dimensions associated with
antenna conductor layout 120,planar dielectric 105,feed line conductor 125,frequency tuning element 130, andimpedance matching elements antenna structure 100 may be adjusted based on varying the relative lengths, widths, and/or thickness of the antenna components described herein. - Certain features described above may be implemented as “logic” or a “unit” that performs one or more functions. This logic or unit may include hardware, such as one or more processors, microprocessors, application specific integrated circuits, or field programmable gate arrays, software, or a combination of hardware and software.
- No element, act, or instruction used in the description of the present application should be construed as critical or essential to the invention unless explicitly described as such. Also, as used herein, the article “a” is intended to include one or more items. Further, the phrase “based on” is intended to mean “based, at least in part, on” unless explicitly stated otherwise.
- In the preceding specification, various preferred embodiments have been described with reference to the accompanying drawings. It will, however, be evident that various modifications and changes may be made thereto, and additional embodiments may be implemented, without departing from the broader scope of the invention as set forth in the claims that follow. The specification and drawings are accordingly to be regarded in an illustrative rather than restrictive sense.
Claims (20)
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US16/593,367 US10992047B2 (en) | 2018-10-23 | 2019-10-04 | Compact folded dipole antenna with multiple frequency bands |
US16/732,457 US10992045B2 (en) | 2018-10-23 | 2020-01-02 | Multi-band planar antenna |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US201862749330P | 2018-10-23 | 2018-10-23 | |
US16/593,367 US10992047B2 (en) | 2018-10-23 | 2019-10-04 | Compact folded dipole antenna with multiple frequency bands |
Related Child Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US16/732,457 Continuation-In-Part US10992045B2 (en) | 2018-10-23 | 2020-01-02 | Multi-band planar antenna |
Publications (2)
Publication Number | Publication Date |
---|---|
US20200127383A1 true US20200127383A1 (en) | 2020-04-23 |
US10992047B2 US10992047B2 (en) | 2021-04-27 |
Family
ID=70279668
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US16/593,367 Active 2039-11-13 US10992047B2 (en) | 2018-10-23 | 2019-10-04 | Compact folded dipole antenna with multiple frequency bands |
Country Status (2)
Country | Link |
---|---|
US (1) | US10992047B2 (en) |
CA (1) | CA3057782C (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20220247090A1 (en) * | 2021-02-04 | 2022-08-04 | Iq Group Sdn. Bhd. | Dipole Antenna |
CN116259961A (en) * | 2023-01-18 | 2023-06-13 | 珠海正和微芯科技有限公司 | Folded dipole antenna |
WO2024039766A1 (en) * | 2022-08-17 | 2024-02-22 | John Mezzalingua Associates, LLC | Folded antenna dipole with on-substrate passive radiators |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN113328233B (en) * | 2020-02-29 | 2022-11-08 | 华为技术有限公司 | Electronic device |
Family Cites Families (35)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2640933A (en) * | 1950-12-12 | 1953-06-02 | Zenith Radio Corp | Dual range antenna |
USRE25437E (en) * | 1955-04-22 | 1963-08-27 | anderson | |
US2888678A (en) * | 1958-07-16 | 1959-05-26 | Antenna Designs Inc | Antenna driven element |
GB2113476B (en) * | 1982-01-15 | 1985-07-03 | Marconi Co Ltd | Antenna arrangement |
US4853705A (en) * | 1988-05-11 | 1989-08-01 | Amtech Technology Corporation | Beam powered antenna |
US5068672A (en) * | 1989-03-06 | 1991-11-26 | Onnigian Peter K | Balanced antenna feed system |
US5322984A (en) * | 1992-04-03 | 1994-06-21 | James River Corporation Of Virginia | Antenna for microwave enhanced cooking |
JP3324243B2 (en) * | 1993-03-30 | 2002-09-17 | 三菱電機株式会社 | Antenna device and antenna system |
US5539414A (en) | 1993-09-02 | 1996-07-23 | Inmarsat | Folded dipole microstrip antenna |
CA2190792C (en) | 1995-11-29 | 1999-10-05 | Koichi Tsunekawa | Antenna device having two resonance frequencies |
US6317099B1 (en) | 2000-01-10 | 2001-11-13 | Andrew Corporation | Folded dipole antenna |
US6650301B1 (en) | 2002-06-19 | 2003-11-18 | Andrew Corp. | Single piece twin folded dipole antenna |
US6791506B2 (en) * | 2002-10-23 | 2004-09-14 | Centurion Wireless Technologies, Inc. | Dual band single feed dipole antenna and method of making the same |
US6822618B2 (en) | 2003-03-17 | 2004-11-23 | Andrew Corporation | Folded dipole antenna, coaxial to microstrip transition, and retaining element |
US6956472B1 (en) * | 2003-04-28 | 2005-10-18 | Walcott Jr James D | Auto hang tag with radio transponder |
TWI264149B (en) * | 2003-05-07 | 2006-10-11 | Hon Hai Prec Ind Co Ltd | Tri-band dipole antenna |
US7064729B2 (en) * | 2003-10-01 | 2006-06-20 | Arc Wireless Solutions, Inc. | Omni-dualband antenna and system |
US7292200B2 (en) | 2004-09-23 | 2007-11-06 | Mobile Mark, Inc. | Parasitically coupled folded dipole multi-band antenna |
US7102577B2 (en) * | 2004-09-30 | 2006-09-05 | Motorola, Inc. | Multi-antenna handheld wireless communication device |
US8564439B2 (en) * | 2010-05-27 | 2013-10-22 | The University Of Kansas | Microstrip antenna for RFID device |
CN101627505A (en) * | 2007-03-06 | 2010-01-13 | 松下电器产业株式会社 | Folding dipole antenna |
KR101007157B1 (en) * | 2007-10-05 | 2011-01-12 | 주식회사 에이스테크놀로지 | Antenna for controlling a direction of a radiation pattern |
US8164537B2 (en) * | 2009-05-07 | 2012-04-24 | Mororola Mobility, Inc. | Multiband folded dipole transmission line antenna |
US8102327B2 (en) | 2009-06-01 | 2012-01-24 | The Nielsen Company (Us), Llc | Balanced microstrip folded dipole antennas and matching networks |
US8952858B2 (en) | 2009-06-17 | 2015-02-10 | L. Pierre de Rochemont | Frequency-selective dipole antennas |
US20110063181A1 (en) * | 2009-09-16 | 2011-03-17 | Michael Clyde Walker | Passive repeater for wireless communications |
US10128564B2 (en) * | 2009-09-16 | 2018-11-13 | Michael Clyde Walker | System and apparatus for clothing with embedded passive repeaters for wireless communication |
JP2012156993A (en) | 2010-12-30 | 2012-08-16 | Telekom Malaysia Berhad | Folded dipole antenna with 450 mhz |
US8860617B1 (en) * | 2011-07-08 | 2014-10-14 | Trivec-Avant Corporation | Multiband embedded antenna |
US9425495B2 (en) * | 2013-02-01 | 2016-08-23 | Michael Clyde Walker | Active antenna ceiling tile |
US9819098B2 (en) * | 2013-09-11 | 2017-11-14 | International Business Machines Corporation | Antenna-in-package structures with broadside and end-fire radiations |
US9742060B2 (en) * | 2014-08-06 | 2017-08-22 | Michael Clyde Walker | Ceiling assembly with integrated repeater antenna |
US10326197B2 (en) * | 2016-09-02 | 2019-06-18 | Semiconductor Components Industries, Llc | Radio frequency identification (RFID) tag device and related methods |
US11515732B2 (en) * | 2018-06-25 | 2022-11-29 | Energous Corporation | Power wave transmission techniques to focus wirelessly delivered power at a receiving device |
US10707582B2 (en) * | 2018-09-28 | 2020-07-07 | Qualcomm Incorporated | Wide-band dipole antenna |
-
2019
- 2019-10-03 CA CA3057782A patent/CA3057782C/en active Active
- 2019-10-04 US US16/593,367 patent/US10992047B2/en active Active
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20220247090A1 (en) * | 2021-02-04 | 2022-08-04 | Iq Group Sdn. Bhd. | Dipole Antenna |
US11515648B2 (en) * | 2021-02-04 | 2022-11-29 | Iq Group Sdn. Bhd. | Dipole antenna |
WO2024039766A1 (en) * | 2022-08-17 | 2024-02-22 | John Mezzalingua Associates, LLC | Folded antenna dipole with on-substrate passive radiators |
CN116259961A (en) * | 2023-01-18 | 2023-06-13 | 珠海正和微芯科技有限公司 | Folded dipole antenna |
Also Published As
Publication number | Publication date |
---|---|
CA3057782A1 (en) | 2020-04-23 |
US10992047B2 (en) | 2021-04-27 |
CA3057782C (en) | 2022-03-22 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US10992047B2 (en) | Compact folded dipole antenna with multiple frequency bands | |
EP1590857B1 (en) | Low profile dual frequency dipole antenna structure | |
US9455493B2 (en) | Dual branch common conductor antenna | |
US6466170B2 (en) | Internal multi-band antennas for mobile communications | |
TWI600210B (en) | Multi-band antenna | |
EP2940795B1 (en) | Multiband antenna | |
US6100848A (en) | Multiple band printed monopole antenna | |
US6774850B2 (en) | Broadband couple-fed planar antennas with coupled metal strips on the ground plane | |
US7145517B1 (en) | Asymmetric flat dipole antenna | |
US7642981B2 (en) | Wide-band slot antenna apparatus with constant beam width | |
WO1996038882A9 (en) | Multiple band printed monopole antenna | |
US10141637B2 (en) | Pattern antenna | |
WO2008000175A1 (en) | Miniature balanced antenna with differential feed | |
US10992045B2 (en) | Multi-band planar antenna | |
US8593368B2 (en) | Multi-band antenna and electronic apparatus having the same | |
US20150009093A1 (en) | Antenna apparatus and portable wireless device equipped with the same | |
US9419336B2 (en) | Compact broadband antenna | |
US11303031B2 (en) | Antenna device and one set of antenna devices | |
KR101285427B1 (en) | Microstrip Multi-Band composite Antenna | |
US20090079659A1 (en) | Multi-mode resonant wideband antenna | |
CA3101992C (en) | Multi-band planar antenna | |
TW200803052A (en) | Triple-band single dipole antenna of small coplanar waveguide feed-in type | |
TW201438347A (en) | Monopole antenna | |
US20060232481A1 (en) | Wideband antenna module for the high-frequency and microwave range | |
JP2009065565A (en) | Antenna |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
AS | Assignment |
Owner name: NEPTUNE TECHNOLOGY GROUP INC., ALABAMA Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:PATTON, DAMON LLOYD;AVERY, VICTORIA ALEXIS;SIGNING DATES FROM 20190910 TO 20191004;REEL/FRAME:050637/0794 |
|
FEPP | Fee payment procedure |
Free format text: ENTITY STATUS SET TO UNDISCOUNTED (ORIGINAL EVENT CODE: BIG.); ENTITY STATUS OF PATENT OWNER: LARGE ENTITY |
|
STPP | Information on status: patent application and granting procedure in general |
Free format text: NOTICE OF ALLOWANCE MAILED -- APPLICATION RECEIVED IN OFFICE OF PUBLICATIONS |
|
STPP | Information on status: patent application and granting procedure in general |
Free format text: PUBLICATIONS -- ISSUE FEE PAYMENT RECEIVED |
|
STPP | Information on status: patent application and granting procedure in general |
Free format text: PUBLICATIONS -- ISSUE FEE PAYMENT VERIFIED |
|
STCF | Information on status: patent grant |
Free format text: PATENTED CASE |